CN201548423U

CN201548423U - Sampling head with three-way structure

Info

Publication number: CN201548423U
Application number: CN2009202138951U
Authority: CN
Inventors: 傅亚铁; 张建杰; 陆晓祖
Original assignee: Shanghai Gaoqiao Sgpec Petrochemical Engineering & Construction Co Ltd
Current assignee: Shanghai Gaoqiao Sgpec Petrochemical Engineering & Construction Co Ltd
Priority date: 2009-11-19
Filing date: 2009-11-19
Publication date: 2010-08-11
Anticipated expiration: 2019-11-19

Abstract

The utility model relates to a sampling head with a three-way structure, which comprises the three-way structure, a sample collection pipe, a waste gas collection pipe and a waste gas recycling pipeline, wherein the sample collection pipe is sleeved in the three-way structure, and one end of the sample collection pipe extends into a pipeline of a sample to be collected, while the other end thereof extends into a sampling bottle; the waste gas collection pipe is sleeved outside the sample collection pipe; the waste gas recycling pipeline is arranged in the three-way structure, and one end of the waste gas recycling pipeline is communicated with the waste gas collection pipe, while the other end is communicated with a waste gas recycling system; and the gas in the sampling bottle passes through the waste gas collection pipe and enters the waste gas recycling system via the waste gas recycling pipeline to be processed. The sampling head provided by the utility model is provided with the three-way structure, so that a sealing washer at the bottle mouth can be conveniently processed; and the sampling head can sweep the sampling head after the sampling to remove the residual sample liquid in the sampling head, thereby efficiently avoiding environment pollution and resulting in safe, simple and convenient operation.

Description

A kind of sampling head with three-port structure

Technical field

The utility model relates to a kind of sampling head device, specifically, relates to a kind of sampling head that is used for various poisonous and harmful fluids at the sampling operation of production, analytic process, is widely used in industrial circles such as medicine, chemical industry and food.

Background technology

The analytical sampling device has in chemical industry, medicine and food industry very to be used widely, and existing sampling head adopts crosspointer structure connecting tube mostly, and its operation is comparatively complicated, and the processing of sampling head is comparatively complicated, and cost is higher.And because the bottleneck of crosspointer structural requirement sampling bottle is bigger, more difficult to the packing washer of bottleneck like this; Be easy to related O-ring seal during sampling operation and be pushed in the sampling bottle, therefore causing the sampling head of present use all is the crosspointer structure sampling head of import, and just needle gage is shorter than homemade sampling head.And, the present sampling head of crosspointer structure, during collected specimens, poisonous and harmful fluid residual in sampling head is difficult to clean, and environmental pollution is serious.Therefore, be badly in need of a kind of sampling head device that can be used for the poisonous and harmful sampling fluids.

The utility model content

The utility model provides a kind of sampling head, and this sampling head has three-port structure, has only a syringe needle, require less to the sampling bottle bottleneck, make things convenient for the processing of the packing washer of bottleneck, and can prevent the leakage pollution on the environment of residual sample in the sampling head, simple and safe operation.

In order to achieve the above object, the utility model provides a kind of sampling head with three-port structure, and this sampling head comprises: three-port structure, this three-port structure have the first one-tenth end, the second one-tenth end and the three one-tenth ends;

Be set in the sampling pipe in the described three-port structure, the first one-tenth end of an end and the three-port structure of this sampling pipe is fixing, and extend on the pipeline of wanting collected specimens; The other end of this collection tube passes the second one-tenth end of three-port structure, and extend in the sampling bottle by the sampling bottleneck, and the sample of collection is transferred in the sampling bottle by described sampling pipe;

Be nested with the gas sampling pipe in the sampling pipe outside, this gas sampling pipe is fixing with the second one-tenth end of three-port structure, and this gas sampling pipe only is nested with the end at sampling pipe, is not to be nested with fully in whole sample collection tube outside; One end of this gas sampling pipe extend in the sampling bottle by the sampling bottleneck, and its other end sealing is arranged on three-port structure inside; And,

Be arranged in the three-port structure and with the three one-tenth exhaust gas recycling tube roads that end is fixing of three-port structure, one end in this exhaust gas recycling tube road is communicated with the end of gas sampling pipe, and be not communicated with the sampling pipe of gas sampling pipe inside, its other end is communicated with gas recovery system; Gas in the sampling bottle enters gas recovery system through the exhaust gas recycling tube road and recycles by the end of gas sampling pipe.

The passage that gas sampling pipe and exhaust gas recycling tube road are formed not only plays the effect of reclaiming fluid sample steam in the collecting bottle, can also make collecting bottle internal pressure and atmospheric pressure balance, the sampling difficulty of avoiding the sampling bottle internal gas pressure to rise and cause.

The first one-tenth end of described three-port structure, the second one-tenth end and the three one-tenth ends adopt threaded connector or cutting ferrule joint respectively, fixedly connected with an end of sampling pipe, an end and the exhaust gas recycling tube road of gas sampling pipe.

The sampling head that the utility model provides has only a syringe needle, require less to the sampling bottle bottleneck, make things convenient for the processing of the packing washer of bottleneck, and use this sampling head with three-port structure, after sampling finishes, can feed nitrogen sampling head is purged, remove the sample raffinate of sampling head inside fully, can effectively avoid environmental pollution, simple and safe operation.

Description of drawings

Accompanying drawing 1 is the structural representation with sampling head of three-port structure of the present utility model.

Embodiment

As shown in Figure 1, the utility model adopts a kind of sampling head with three-port structure, and this sampling head comprises:

Three-port structure 1, this three-port structure have the first one-tenth end 11, the second one-tenth end 12 and the three one-tenth ends 13;

Be set in the sampling pipe 2 in the three-port structure, the first one-tenth end of these collection tube 2 one ends 21 and three-port structure, 11 bite types are fixedly connected, and extend on the pipeline of sample to be collected, in order to collected specimens; The other end 22 of this collection tube 2 passes the second one-tenth of three-port structure 1 and holds 12, extend in the sampling bottle 5 by the sampling bottleneck; The sample of gathering is transferred in the sampling bottle 5 by described sampling pipe 2;

Be nested with gas sampling pipe 3 in sampling pipe 2 outsides, this gas sampling pipe 3 only is set in 22 those ends of collection tube 2, be not set in the outside of whole collection tube 2, this gas sampling pipe 3 is fixedly connected with the second one-tenth end 12 bite type of three-port structure 1, and an end 31 of this gas sampling pipe 3 extend in the sampling bottle 5 by the sampling bottleneck; The other end 32 sealings of this gas sampling pipe 3 are arranged on the inside of three-port structure 1, make its pipeline through hole be in closed state with the first one-tenth end 11 of three-port structure; And,

Be arranged in the three-port structure 1 and with the three one-tenth fixedly connected exhaust gas recycling tube roads 4 of end 13 bite types of three-port structure 1, one end 41 in this exhaust gas recycling tube road 4 is communicated with the end 32 of gas sampling pipe 3, and be not communicated with the sampling pipe 2 of gas sampling pipe 3 inside, its other end 42 is communicated with gas recovery system; Gas in the sampling bottle 5 enters gas recovery system through exhaust gas recycling tube road 4 and recycles by the end 31 of gas sampling pipe 3.

Sampling bottle 5 by the packing washer of bottleneck, with the gas sampling pipe 3 that stretches in the sampling bottle 5, seals in the bottleneck junction; When gathering fluid sample, the fluid sample of being gathered enters into sampling bottle 5 by sampling pipe 2; When gathering, the fluid steam in the sampling bottle 5 enters into gas sampling pipe 3 by the through hole of the end 31 of gas sampling pipe 3, then, is connected with gas recovery system through exhaust gas recycling tube road 4, and waste gas is recycled; And the air in the collecting bottle 5 also is connected with atmosphere by this passage, in order to avoid pressure rises in the collecting bottle, influence is gathered; After collection finishes, feed each pipeline in the purging with nitrogen gas three-port structures 1, comprise sampling pipe 2, gas sampling pipe 3 and exhaust gas recycling tube road 4 from the port 21 of sampling pipe 2; Can avoid the residual of interior solvent of above-mentioned pipeline and steam thereof, contaminated environment, harmful to human.

Because the utility model adopts the sampling head with three-port structure, need only a syringe needle and both can finish, lower to the bottleneck seal request, and collected specimens finishes, and also can feed nitrogen and purge, and removes the residual sample in the pipeline, make that this sampling head is environmentally friendly, safe.

Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be conspicuous.Therefore, protection domain of the present utility model should be limited to the appended claims.

Claims

1. the sampling head with three-port structure is characterized in that, this sampling head comprises:

Three-port structure (1), this three-port structure have the first one-tenth end (11), the second one-tenth end (12) and the three one-tenth ends (13);

Be set in the sampling pipe (2) in the described three-port structure (1), the first one-tenth end of one end (21) and three-port structure (11) of this sampling pipe (2) is fixing, and extend on the pipeline of sample to be collected, its other end (22) passes the second one-tenth end (12) of three-port structure (1), extend in the sampling bottle (5);

Be nested with at the outside gas sampling pipe (3) of sampling pipe (2), one end (31) of this gas sampling pipe (3) is fixing with the second one-tenth end (12) of three-port structure, and extend in the sampling bottle (5), its other end (32) sealing is arranged on the inside of three-port structure (1); And be arranged in the three-port structure (1) and with the fixing exhaust gas recycling tube road (4) of the three one-tenth ends (13) of three-port structure (1), one end (41) is communicated with the end (32) of gas sampling pipe, its other end (42) is communicated with gas recovery system.

2. the sampling head with three-port structure as claimed in claim 1, it is characterized in that, the first one-tenth end (11) of described three-port structure (1), the second one-tenth end (12) and the three one-tenth ends (13) adopt threaded connector or cutting ferrule joint respectively, fixedly connected with an end (21) of sampling pipe (1), an end (31) and exhaust gas recycling tube road (4) of gas sampling pipe (3).

3. the sampling head with three-port structure as claimed in claim 1 is characterized in that, described exhaust gas recycling tube road (4) sampling pipe (1) inner with being arranged on gas sampling pipe (3) is not communicated with.